Concentrating-table.



W. A. 'HUELSDONK. GONGENTRATING TABLE. APPLICATION FILED JUNE 23,1913.

Patented July 21, 1914.

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' Original application filed January WILLIAM A. HUELSDONK, OF LE GRAND,CALIFORNIA.-

CONCENTRATING-TABLE.

To all whom it may concern:

Be it known that 1, WILLIAM A. Home- DONK, a citizen of the UnitedStates, residing at Le Grand, in the county of Merced, State ofCalifornia, have invented certain new and useful Improvements inConcentrating-Tables; and I do declare'the following to be a clear,full, and exact description of the same, such as will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings and to the charactersof reference marked thereon,

which form a part of this application.

This invention relates to improvements in concentrating tablesand is thetype of table shown in my application for patent filed January 23rd,1913, Ser. No. 743,783, of which this case is a divisional part.

The object of the invent-ion is to produce a concentrating table for usein a concentrating mechanism, which table is especially designed for usebeneath a longitudinal distributing trough from which the water andmineral to be concentrated come in properly proportioned amounts. Theconcentrating table is provided with a longitudinal screen on which thematerial drops from the distributing trough. Said screen preventssplashing and from such screen the material passes off on each side ofthe same onto the table proper.

A further object of the invention is to produce a simple and inexpensivedevice and yet one which will be exceedingly effective for the purposesfor which it is designed.

These objects, I accomplish by means of such structure and relativearrangement of the parts as will fully appear by a perusal of thefollowing specification and claim.

On the drawings similar characters of reference indicate correspondingparts in the several views.

Figure 1 is an end view of the complete table. Fig. 2 is a top plan viewof the same.

Referring now more particularly to the characters of reference on thedrawings, the numeral 1 designates the distributing trough which may ofcourse be of any suitable type. The concentrating table proper consistsof a longitudinally disposed member 2 positioned directly. under thedistributing trough 1 to first receive the material therefrom and saidmember 2 is provided with a Specification of Letters Patent.

Patented July 21, 1914.

23, 1913, Serial No. 743,783. Divided and. this application filed June23,

1913. Serial No. 775,190.

wire mesh or screen 3 of suitable size to prevent splashing of water andmaterial.

It is a well known fact that in order to receive the best results in theconcentrating of pulp, slime or fine sand, it isnecessary to maintainthe same as nearly unagitated as possible during the delivering of thesame to the concentrating device in order that the very fine gold mayremain as near the bottom of the material as possible so it can becaught and held as the material passes over the concentrating table. Itis therefore the function of the raised central member 2 with the screenthereon, to catch the material as it comes from the delivering means andthen, by reason of the mesh of the screen, it will be held for a momentin suspension before it flows over the sides of the elevated member ontothe concentrating table proper. This moment of suspension allows it tosettle and become unagitated prior to its passing onto the concentratingtable and further the mesh of the screen tends to prevent any splashingof the water or material from the elevated member onto the concentratingtable, as above noted.

The special function of having the central member 2 raised above thelevel of the concentrating table proper is as follows: The concentratingtable here shown is designed especially for use on gold dredgers wherethe table may not be at all times perfectly level, that is, it may be atdifierent angles according to the position the dredger assumes. Underthese conditions such raised central portion prevents the material whichhas fallen on one side of the table from thereafter crowding over andpassing back to the other side of the table which it would do if thetable tilted at an angle and such central portion was not there. A stillfurther object of said central raised portion 2 is to provide a littlefall for the pulp after it strikes the screen and separates, in whichfall the gold falls the fastest and will nearly always slide directlydown the sides of the elevated portion 2, thus bringing it directly onthe table from which it will not raise again, whereby it is more easilyrecovered from the slime. From said screen the material falls over oneach side of said central member 2 onto the riiiles or corrugations 1which are disposed in a slightly sloping manner from said member 2 tothe outer edges of the table where the overflow passes into troughsShaving discharge outlets 6 adapted to lead to the tailing pile. Theforward end of the table is provided with chutes 7 over which theconcentrates discharge into a suitable receptacle. The rillies 4: ofcourse catch and discharge the precious metals and the concentrates atthe end and over the chutes 7 in the usual manner. These riflles may beof any usual make. The table may be vibrated in any desired manner.

From the foregoing description it will be readily seen that I haveproduced such a device as substantially fulfils the objects of theinvention as set forth herein.

While this specification sets forth in detail the presentand preferredconstruction of the device, still in practice, such deviations from suchdetail may be resorted to as do not form a departure from the spirit ofthe invention.

Having thus described my invention what I claim as new and useful anddesire to secure by Letters Patent 1s:

A concentrating table consisting of a cenprovided with a plurality of Intestimony whereof I aflix my signature in presence of two witnesses.

WILLIAM A. HUELSDONK.

lVitnesses:

S. W. DICKINSON, R. H. WALLIS.

ts each, by addressing the Commissioner of Patents,

Washington, D. G.

